85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/*******************************************************************************
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*
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* "cs4281pm.c" -- Cirrus Logic-Crystal CS4281 linux audio driver.
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*
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* Copyright (C) 2000,2001 Cirrus Logic Corp.
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* -- tom woller (twoller@crystal.cirrus.com) or
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* (audio@crystal.cirrus.com).
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* 12/22/00 trw - new file.
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*
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*******************************************************************************/
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#ifndef NOT_CS4281_PM
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#include <linux/pm.h>
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#define cs_pm_register(a, b, c) pm_register((a), (b), (c));
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#define cs_pm_unregister_all(a) pm_unregister_all((a));
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static int cs4281_suspend(struct cs4281_state *s);
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static int cs4281_resume(struct cs4281_state *s);
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/*
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* for now (12/22/00) only enable the pm_register PM support.
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* allow these table entries to be null.
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#define CS4281_SUSPEND_TBL cs4281_suspend_tbl
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#define CS4281_RESUME_TBL cs4281_resume_tbl
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*/
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#define CS4281_SUSPEND_TBL cs4281_suspend_null
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#define CS4281_RESUME_TBL cs4281_resume_null
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static int cs4281_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data)
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{
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struct cs4281_state *state;
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CS_DBGOUT(CS_PM, 2, printk(KERN_INFO
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"cs4281: cs4281_pm_callback dev=%p rqst=0x%x state=%p\n",
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dev,(unsigned)rqst,data));
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state = (struct cs4281_state *) dev->data;
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if (state) {
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switch(rqst) {
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case PM_SUSPEND:
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CS_DBGOUT(CS_PM, 2, printk(KERN_INFO
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"cs4281: PM suspend request\n"));
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if(cs4281_suspend(state))
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{
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CS_DBGOUT(CS_ERROR, 2, printk(KERN_INFO
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"cs4281: PM suspend request refused\n"));
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return 1;
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}
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break;
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case PM_RESUME:
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CS_DBGOUT(CS_PM, 2, printk(KERN_INFO
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"cs4281: PM resume request\n"));
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if(cs4281_resume(state))
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{
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CS_DBGOUT(CS_ERROR, 2, printk(KERN_INFO
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"cs4281: PM resume request refused\n"));
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return 1;
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}
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break;
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}
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}
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return 0;
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}
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#else /* CS4281_PM */
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#define CS4281_SUSPEND_TBL cs4281_suspend_null
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#define CS4281_RESUME_TBL cs4281_resume_null
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#endif /* CS4281_PM */
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